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The Speckle Reducing Anisotropic Diffusion (SRAD) function is similar to the L_AverageFilterBitmap function, but is used to reduce noise and speckling in images while preserving the edges instead of blurring.

All three reduce noise and preserve edges and perform better than the L_MedianFilterBitmap or L_GaussianFilterBitmap functions. With the anisotropic functions, areas within regions are smoothed, but the edges are not affected.

The number of iterations controls the number of times the filter will be applied to an image. The lower the number of iterations, the faster the filter will perform. Higher iterations typically mean clearer results.

This function can only process the entire image. It does not support regions.